What is the air quality trend in Niagara?

Over the past 8 days, Niagara had an average AQI of 49 based on station measurements. The worst day was 2026-05-25 with AQI 67.

How is Niagara air quality measured?

Air quality in Niagara is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Niagara, Canada

Name: Niagara Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Niagara, Canada.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 15 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-30	41	27–81	10.9 µg/m³	1.9	9h	12
2026-05-29	52	14–148	15.1 µg/m³	12.1	24h	15
2026-05-28	36	18–94	9.0 µg/m³	1.6	24h	15
2026-05-27	55	21–158	16.3 µg/m³	6.1	24h	15
2026-05-26	46	17–115	12.7 µg/m³	6.0	24h	13
2026-05-25	67	25–156	20.4 µg/m³	11.2	24h	16
2026-05-24	42	20–77	11.0 µg/m³	7.1	24h	15
2026-05-23	57	23–89	16.1 µg/m³	3.1	15h	17

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